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**Harvard**

Smith, D., Braaten, E., Kang, D. och Platter, L. (2014) *Two-Body and Three-Body Contacts for Identical Bosons near Unitarity*.

** BibTeX **

@article{

Smith2014,

author={Smith, D. H. and Braaten, E. and Kang, D. and Platter, Lucas},

title={Two-Body and Three-Body Contacts for Identical Bosons near Unitarity},

journal={Physical Review Letters},

issn={0031-9007},

volume={112},

issue={11},

pages={Article no. 110402},

abstract={In a recent experiment with ultracold trapped Rb-85 atoms, Makotyn et al. studied a quantum-degenerate Bose gas in the unitary limit where its scattering length is infinitely large. We show that the observed momentum distributions are compatible with a universal relation that expresses the high-momentum tail in terms of the two-body contact C-2 and the three-body contact C-3. We determine the contact densities for the unitary Bose gas with number density n to be C-2 approximate to 20n(4/3) and C-3 approximate to 2n(5/3). We also show that the observed atom loss rate is compatible with that from 3-atom inelastic collisions, which gives a contribution proportional to C-3, but the loss rate is not compatible with that from 2-atom inelastic collisions, which gives a contribution proportional to C-2. We point out that the contacts C-2 and C-3 could be measured independently by using the virial theorem near and at unitarity, respectively.},

year={2014},

keywords={CORRELATED FERMI GAS },

}

** RefWorks **

RT Journal Article

SR Electronic

ID 196898

A1 Smith, D. H.

A1 Braaten, E.

A1 Kang, D.

A1 Platter, Lucas

T1 Two-Body and Three-Body Contacts for Identical Bosons near Unitarity

YR 2014

JF Physical Review Letters

SN 0031-9007

VO 112

IS 11

AB In a recent experiment with ultracold trapped Rb-85 atoms, Makotyn et al. studied a quantum-degenerate Bose gas in the unitary limit where its scattering length is infinitely large. We show that the observed momentum distributions are compatible with a universal relation that expresses the high-momentum tail in terms of the two-body contact C-2 and the three-body contact C-3. We determine the contact densities for the unitary Bose gas with number density n to be C-2 approximate to 20n(4/3) and C-3 approximate to 2n(5/3). We also show that the observed atom loss rate is compatible with that from 3-atom inelastic collisions, which gives a contribution proportional to C-3, but the loss rate is not compatible with that from 2-atom inelastic collisions, which gives a contribution proportional to C-2. We point out that the contacts C-2 and C-3 could be measured independently by using the virial theorem near and at unitarity, respectively.

LA eng

DO 10.1103/PhysRevLett.112.110402

LK http://dx.doi.org/10.1103/PhysRevLett.112.110402

LK http://publications.lib.chalmers.se/records/fulltext/196898/local_196898.pdf

OL 30